MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 21f49ea6e105c22882a9fb0065803deee18eddb76767a30ddade2e2725eb65d9. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
GuLoader
Vendor detections: 10
| SHA256 hash: | 21f49ea6e105c22882a9fb0065803deee18eddb76767a30ddade2e2725eb65d9 |
|---|---|
| SHA3-384 hash: | 103ac63088562bc57a27f78012862296f14014e6c9547b06e8581c1b30efa09ff6eda121dcbf53969318b34300408cd1 |
| SHA1 hash: | dcb9549ff9c290e056f83639ad546b03206a0806 |
| MD5 hash: | 5525bb8a978d3ac15812c8d8ca9b8a57 |
| humanhash: | twenty-undress-papa-magazine |
| File name: | IRS_Covid-19_Relief_Payment_Notice_pdf.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 86'016 bytes |
| First seen: | 2021-01-19 17:54:37 UTC |
| Last seen: | 2021-01-19 19:55:01 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 98834e8b1c22ed6d1484c39b625780c4 (1 x GuLoader) |
| ssdeep | 768:bwSsRk+UMfhoeoCm0TI4Y4az55+mGMZkNS8+EMaybN1hBuKYR6mTLktPV9lIBtyd:JzTMoCnbO5+mG4ietbzhBuKYT3yVQm |
| Threatray | 8'244 similar samples on MalwareBazaar |
| TLSH | 20833A967380E536CBE982F1672606A4016E6B763709CB0761B8CBDF1B73ACAC571353 |
| Reporter |  abuse_ch |
| Tags: | covid19 exe GuLoader IRS |
Intelligence
File Origin
# of uploads :
2
# of downloads :
332
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
IRS_Covid-19_Relief_Payment_Notice_pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-01-19 18:07:58 UTC
Tags:
covid19
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Detection(s):
Result
Verdict:
Clean
Maliciousness:
Behaviour
Sending a custom TCP request
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Result
Verdict:
SUSPICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Signature
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Contains functionality to hide a thread from the debugger
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Executable has a suspicious name (potential lure to open the executable)
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected Generic Dropper
Yara detected GuLoader
Yara detected VB6 Downloader Generic
Behaviour
Behavior Graph:
Threat name:
Win32.Spyware.Noon
Status:
Malicious
First seen:
2021-01-19 17:55:07 UTC
AV detection:
10 of 28 (35.71%)
Threat level:
2/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
formbook
guloader
Similar samples:
+ 8'234 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook rat spyware stealer trojan
Behaviour
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.greatamericapolling.com/71m/
Unpacked files
SH256 hash:
49b04162c412105ab0857de16713724cbf3234a0b6ba51f3a5286312633f20c3
MD5 hash:
1f1b425190b2fb0396ad2d538b1060ba
SHA1 hash:
413f98641d46fdcabfcaf64f29495667de6282ea
SH256 hash:
21f49ea6e105c22882a9fb0065803deee18eddb76767a30ddade2e2725eb65d9
MD5 hash:
5525bb8a978d3ac15812c8d8ca9b8a57
SHA1 hash:
dcb9549ff9c290e056f83639ad546b03206a0806
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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